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प्रश्न
In the diagram shown alongside a claw hammer, mark the fulcrum (F) and indicate the directions of load (L) and effort (E) with arrows. What class of lever is it? Give one more example of this class of lever.
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उत्तर
Claw-hammer is the lever of the first order. One more example of this class of lever is a see-saw. In the following diagram, F indicates the position of the fulcrum. The arrows labelled L and E respectively indicate the directions of load and effort.
संबंधित प्रश्न
Give three examples for leavers of 1st order.
Which class of lever found in the human body is being used by a boy when he raises the weight of his body on his toes?
The following belong to which class of lever?
Human-arm
The following belong to which class of lever?
Pliers Tools
The following belong to which class of lever?
A pair of scissors
The following belong to which class of lever?
Wheelbarrow
Draw a labelled sketch of a second class lever. Give one example of such a lever.
What is a lever?
The diagram shows the use of a lever.
- State the principle of moments as applied to the above lever.
- Which class of lever is this? Give an example of this class of lever.
- If FA = 100 cm, AB = 90 cm, calculate the minimum effort required to lift the load.
A crowbar of length 100 cm is used to lift a load of 5 kgf. It has its fulcrum at a distance of 20 cm from the load. Calculate:
(i) the mechanical advantage of a crowbar and,
(ii) the effort applied at the other end.
